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The real-time dynamic holographic display of LN:Bi,Mg crystals and defect-related electron mobility 被引量:5
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作者 Shuolin Wang Yidong Shan +5 位作者 Dahuai Zheng Shiguo Liu Fang Bo Hongde Liu Yongfa Kong Jingjun Xu 《Opto-Electronic Advances》 SCIE EI CAS 2022年第12期1-9,共9页
Holographic display has attracted widespread interest because of its ability to show the complete information of the object and bring people an unprecedented sense of presence. The absence of ideal recording materials... Holographic display has attracted widespread interest because of its ability to show the complete information of the object and bring people an unprecedented sense of presence. The absence of ideal recording materials has hampered the realization of their commercial applications. Here we report that the response time of a bismuth and magnesium codoped lithium niobate(LN:Bi,Mg) crystal is shortened to 7.2 ms and a sensitivity as high as 646 cm/J. The crystal was used to demonstrate a real-time holographic display with a refresh rate of 60 Hz, as that of the popular high-definition television. Moreover, the first-principles calculations indicate that the electron mobility while Bi occupying Nb-site is significantly greater than that in Li-site, which directly induces the fast response of LN:Bi,Mg crystals when the concentration of Mg is above its doping threshold. 展开更多
关键词 holographic display lithium niobate PHOTOREFRACTIVE electron mobility
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One Step Hologram Calculation for Holographic 3D Display Based on Nonuniform Sampled Angular Spectrum Method
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作者 CHANG Chenliang XIA Jun LEI Wei 《ZTE Communications》 2016年第B12期43-47,共5页
We proposed a method for calculating the computer generated hologram from multi-plane 3D objects by using nonuniform sampled angular spectrum method (NUASM). Both of the holo-gram plane and the image plane are nonun... We proposed a method for calculating the computer generated hologram from multi-plane 3D objects by using nonuniform sampled angular spectrum method (NUASM). Both of the holo-gram plane and the image plane are nonuniform sampled according to the distances and positions of the three-dimensional objects. The nonuniform fast Fourier transform (NUFFT) is used to calculate the angular spectrum propagation from the image plane to the hologram plane and the hologram can be calculated in only one step. Simulation and optical experiment results show that the hologram generated in this way can reconstruct objects on multi- planes simultaneously and separately without axial distortion. 展开更多
关键词 holographic display computer holography nonuniform fastFourier transform
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Large viewing angle holographic 3D display system based on maximum diffraction modulation 被引量:4
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作者 Di Wang Nan-Nan Li +5 位作者 Yi-Long Li Yi-Wei Zheng Zhong-Quan Nie Zhao-Song Li Fan Chu Qiong-Hua Wang 《Light(Advanced Manufacturing)》 2023年第3期195-205,共11页
An ideal holographic 3D display should have the characteristics of large viewing angle,full color,and low speckle noise.However,the viewing angle of the holographic 3D display is usually limited by existing strategies... An ideal holographic 3D display should have the characteristics of large viewing angle,full color,and low speckle noise.However,the viewing angle of the holographic 3D display is usually limited by existing strategies,which vastly hinders its extensive application.In this paper,a large viewing angle holographic 3D display system based on maximum diffraction modulation is proposed.The core of the proposed system comprises the spatial light modulators(SLMs)and liquid crystal grating.We also present a new feasible scheme for the realization of large viewing angle holographic 3D display.This is achieved by considering the maximum diffraction angle of SLM as the limited diffraction modulation range of each image point.By doing so,we could not only give access to the maximum hologram size of the object,but also tune the reconstructed image of secondary diffraction by using a self-engineered liquid crystal grating.More importantly,the proposed maximum diffraction modulation scheme enables the viewing angle of the proposed system to be enlarged to 73.4°.The proposed system has huge application potential in the fields such as education,culture,and entertainment. 展开更多
关键词 3D display Liquid crystal grating holographic 3D display Spatial light modulator
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Holographic storage of three-dimensional image and data using photopolymer and polymer dispersed liquid crystal films 被引量:2
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作者 高洪跃 刘攀 +7 位作者 曾超 姚秋香 郑志强 刘吉成 郑华东 于瀛洁 曾震湘 孙涛 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期74-78,共5页
We present holographic storage of three-dimensional(3D) images and data in a photopolymer film without any applied electric field.Its absorption and diffraction efficiency are measured,and reflective analog hologram... We present holographic storage of three-dimensional(3D) images and data in a photopolymer film without any applied electric field.Its absorption and diffraction efficiency are measured,and reflective analog hologram of real object and image of digital information are recorded in the films.The photopolymer is compared with polymer dispersed liquid crystals as holographic materials.Besides holographic diffraction efficiency of the former is little lower than that of the latter,this work demonstrates that the photopolymer is more suitable for analog hologram and big data permanent storage because of its high definition and no need of high voltage electric field.Therefore,our study proposes a potential holographic storage material to apply in large size static 3D holographic displays,including analog hologram displays,digital hologram prints,and holographic disks. 展开更多
关键词 holographic displays holographic information storage photopolymer collinear holography
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Latest development of display technologies
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作者 高洪跃 姚秋香 +7 位作者 刘攀 郑志强 刘吉成 郑华东 曾超 于瀛洁 孙涛 曾震湘 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期1-8,共8页
In this review we will focus on recent progress in the field of two-dimensional(2D) and three-dimensional(3D)display technologies.We present the current display materials and their applications,including organic l... In this review we will focus on recent progress in the field of two-dimensional(2D) and three-dimensional(3D)display technologies.We present the current display materials and their applications,including organic light-emitting diodes(OLEDs),flexible OLEDs quantum dot light emitting diodes(QLEDs),active-matrix organic light emitting diodes(AMOLEDs),electronic paper(E-paper),curved displays,stereoscopic 3D displays,volumetric 3D displays,light field3 D displays,and holographic 3D displays.Conventional 2D display devices,such as liquid crystal devices(LCDs) often result in ambiguity in high-dimensional data images because of lacking true depth information.This review thus provides a detailed description of 3D display technologies. 展开更多
关键词 display technology two-dimensional displays three-dimensional displays holographic displays
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Liquid crystal Fresnel lens display
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作者 王骁乾 Srivastava Abhishek Kumar +4 位作者 谈明威 郑致刚 沈冬 Chigrinov G Vladimir 郭海成 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期88-90,共3页
A novel see-through display with a liquid crystal lens array was proposed.A liquid crystal Fresnel lens display(LCFLD) with a holographic screen was demonstrated.The proposed display system has high efficiency,simpl... A novel see-through display with a liquid crystal lens array was proposed.A liquid crystal Fresnel lens display(LCFLD) with a holographic screen was demonstrated.The proposed display system has high efficiency,simple fabrication,and low manufacturing cost due to the absence of a polarizer and color filter. 展开更多
关键词 see-through display liquid crystal Fresnel lens array holographic screen
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360° light field 3D display system based on a triplet lenses array and holographic functional screen 被引量:5
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作者 高鑫 桑新柱 +3 位作者 于迅博 张婉璐 颜玢玢 余重秀 《Chinese Optics Letters》 SCIE EI CAS CSCD 2017年第12期48-52,共5页
A 360° light field 3D display system is presented, which consists of a liquid crystal display, a novel triplet lenses array, and a holographic functional screen (HFS). The mapping relationship among pixels, 3D ... A 360° light field 3D display system is presented, which consists of a liquid crystal display, a novel triplet lenses array, and a holographic functional screen (HFS). The mapping relationship among pixels, 3D objects, and view- ing positions are investigated. The aberration analysis of the single lens is carried out both in the simulation and the experiment, which shows that it cannot provide an excellent 3D image to the viewers. In order to suppress the aberrations, "the primary aberration theory" and "the damped least-squares method" are used for optical analysis and lens design. A 3D image with aberration correction can be viewed around the proposed display system. 展开更多
关键词 light field 3D display system based on a triplet lenses array and holographic functional screen
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Real-time pupil tracking backlight system for holographic 3D display(Invited Paper)
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作者 Hyon-Gon Choo Minsik Park +6 位作者 Hyun-Eui Kim Chanyeol Bae Byung Gyu Chae Hwi Kim Kyungae Moon Jinwoong Kim Joonku Hahn 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第6期12-15,共4页
We propose an automatic three-dimensionM (3D) pupil tracking backlight system for holographic 3D display system with large image size and full-parallax accommodation effect. The proposed tracking module is applied t... We propose an automatic three-dimensionM (3D) pupil tracking backlight system for holographic 3D display system with large image size and full-parallax accommodation effect. The proposed tracking module is applied to a holographic 3D display system with two sets of directional holographic imaging module composed of 2 × 2 large scale lens array and 22-inch high-resolution liquid crystal display 3D panel. System architecture is described and experimental results are presented. 展开更多
关键词 Invited Paper Real-time pupil tracking backlight system for holographic 3D display SLM time
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Fast processing method to generate gigabyte computer generated holography for three-dimensional dynamic holographic display 被引量:6
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作者 张迎曦 刘娟 +1 位作者 李昕 王涌天 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第3期37-41,共5页
Two different methods from graphic processing unit (GPU) and central processing unit (CPU) are proposed to suitably optimize look-up table algorithms of computer generated holography (CGH). The numerical simula-... Two different methods from graphic processing unit (GPU) and central processing unit (CPU) are proposed to suitably optimize look-up table algorithms of computer generated holography (CGH). The numerical simula- tions and experimental results show that we can reconstruct a good quality object. The computation of CGH for a three-dimensional (3D) dynamic holographic display can also be sped up by programming with our proposed method. It can optimize both file loading and the inline calculation process. The phase-only CGH with gigabyte data for reconstructing 10 MB object samplings is generated. In addition, the proposed method effectively re- duced time costs of loading and writing offline tables on a CPU. It is believed the proposed method can provide high speed and huge data CGH for 3D dynamic holographic displays in the near future. 展开更多
关键词 holographic displays HOLOGRAPHY PROCESSING Program processors Table lookup
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Spatiotemporal double-phase hologram for complex-amplitude holographic displays 被引量:7
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作者 Xiaomeng Sui Zehao He +3 位作者 Hao Zhang Liangcai Cao Daping Chu Guofan Jin 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第10期15-18,共4页
This Letter describes an approach to encode complex-amplitude light waves with spatiotemporal double-phase holograms(DPHs) for overcoming the limit of the space-bandwidth product(SBP) delivered by existing methods. To... This Letter describes an approach to encode complex-amplitude light waves with spatiotemporal double-phase holograms(DPHs) for overcoming the limit of the space-bandwidth product(SBP) delivered by existing methods. To construct DPHs, two spatially macro-pixel encoded phase components are employed in the SBP-preserved resampling of complex holograms. Four generated sub-DPHs are displayed sequentially in time for high-quality holographic image reconstruction without reducing the image size or discarding any image terms when the DPHs are interweaved. The reconstructed holographic images contain more details and less speckle noise, with their signal-to-noise ratio and structure similarity index being improved by 14.64% and 78.79%,respectively. 展开更多
关键词 computer generated holography complex amplitude hologram double phase hologram holographic display
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High-quality three-dimensional holographic display with use of multiple fractional Fourier transform 被引量:2
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作者 郑华东 于瀛洁 +1 位作者 王涛 代林茂 《Chinese Optics Letters》 SCIE EI CAS CSCD 2009年第12期1151-1154,共4页
In order to realize holographic display of three-dimensional (3D) objects and suppress zero-order light, conjugate image, and speckle noise, a novel method is proposed based on multiple fractional Fourier transform ... In order to realize holographic display of three-dimensional (3D) objects and suppress zero-order light, conjugate image, and speckle noise, a novel method is proposed based on multiple fractional Fourier transform (M-FrFT) for cMculating holograms of 3D objects. A series of kinoforms are generated by adding pseudorandom phase factor (PPF) to object planes in calculating each kinoform, and generating the PPF randomly again in the next kinoform calculation. The reconstructed images from kinoform sequence are superposed together in order to suppress the speckle noise of reconstructed image and improve the contrast and detail resolution of the reconstructed images. The qualities of reconstructed images from single amplitude hologram, single kinoform, and kinoform sequence calculated by M-FrFT are compared. The effects of suppressing speckle noise are analyzed by calculating the speckle index of numerical reconstructed images. The analytical results illustrate that, with the proposed method for 3D holographic display, the zero-order light, conjugate image, and speckle noise can be suppressed, and the qualities of reconstructed images can be improved significantly. 展开更多
关键词 Fourier transforms HOLOGRAMS holographic displays SPECKLE
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3D displays: toward holographic video displays of 3D images 被引量:4
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作者 Pochi Yeh Claire Gu 《Chinese Optics Letters》 SCIE EI CAS CSCD 2013年第1期11-17,共7页
As the fiat panel displays (Liquid Crystal Displays, AMOLED, etc.) reach near perfection in their viewing qualities and display areas, it is natural to seek the next level of displays, including 3D displays. There i... As the fiat panel displays (Liquid Crystal Displays, AMOLED, etc.) reach near perfection in their viewing qualities and display areas, it is natural to seek the next level of displays, including 3D displays. There is a strong surge in 3D liquid crystal displays as a result of the successful movie Avatar. Most of these 3D displays involve the employment of special glasses that allow one view perspective for each of the eyes to achieve a depth perception. Such displays are not real 3D displays. In fact, these displays can only provide one viewing perspective for all viewers, regardless of the viewer's position. In addition, a fundamental viewing problem of focusing and accommodation exist that can lead to discomfort and fatigue for many viewers. In this paper, the authors review the current status of stereoscopic 3D displays and their problems. The authors will also discuss the possibility of using fiat panels for the display of both phase and intensity of video image information, leading to the ultimate display of 3D holographic video images. Many of the fundamental issues and limitations will be presented and discussed. 展开更多
关键词 toward holographic video displays of 3D images displayS
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Holographic augmented reality display with conical holographic optical element for wide viewing zone 被引量:7
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作者 Yusuke Sando Kazuo Satoh +1 位作者 Daisuke Barada Toyohiko Yatagai 《Light(Advanced Manufacturing)》 2022年第1期166-174,共9页
In this study, we propose a holographic augmented reality (AR) display with a wide viewing zone realized by using a special-designed reflective optical element. A conical holographic optical element (HOE) is used as s... In this study, we propose a holographic augmented reality (AR) display with a wide viewing zone realized by using a special-designed reflective optical element. A conical holographic optical element (HOE) is used as such a reflective optical element. This conical HOE was implemented to reconstruct a diverging spherical wave with a wide spread angle. It has a sharp wavelength selectivity by recording it as a volume hologram, enabling augmented reality (AR) representation of real and virtual 3D objects. The quality of the generated spherical wave and the spectral reflectivity of the fabricated conical HOE were investigated. An optical superimposition between real and virtual 3D objects was demonstrated, thereby enhancing the validity of our proposed method. A horizontal viewing zone of 140° and a vertical viewing zone of 30° were experimentally confirmed. The fabrication procedure for the conical HOE is presented, and the calculation method of the computer-generated hologram (CGH) based on Fermat’s principle is explained in detail. 展开更多
关键词 holographic 3D display holographic optical element Conical hologram Wide viewing zone
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Advances in the light field displays based on integral imaging and holographic techniques(Invited Paper) 被引量:1
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作者 Nam Kim Md. Ashraful Alam +3 位作者 Le Thanh Bang Anh-Hoang Phan Mei-Lan Piao Munkh-Uchral Erdenebat 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第6期16-20,共5页
Light field displays comprise three-dimensional (3D) visual information presentation devices capable of providing realistic and full parallax autostereoscopic images. In this letter, the recent advances in the light... Light field displays comprise three-dimensional (3D) visual information presentation devices capable of providing realistic and full parallax autostereoscopic images. In this letter, the recent advances in the light field displays based on integral imaging (II) and holographic techniques are presented. Several advanced approaches to demonstrate the light field displays including viewing angle enhancement techniques of the II display, a fast hologram generation method using graphics processing unit (GPU) and multiple WRPs, and a holographic microscopy to display the living cells are reported. These methods improve some important constraints of the light field displays and add new features. 展开更多
关键词 Advances in the light field displays based on integral imaging and holographic techniques II GPU
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Color holographic display based on azo-dye-doped liquid crystal(Invited Paper)
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作者 李潇 陈超平 +6 位作者 李燕 姜新红 李洪婧 胡伟 何谷峰 陆建钢 苏翼凯 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第6期8-11,共4页
A multiplexed holographic display video has been achieved by using a passive azo-dye-doped liquid crystal (LC) cell. Holograms formed in this cell can be refreshed in the order of several milliseconds. By angular mu... A multiplexed holographic display video has been achieved by using a passive azo-dye-doped liquid crystal (LC) cell. Holograms formed in this cell can be refreshed in the order of several milliseconds. By angular multiplexing technique, dynamically multiplexed holographic videos are realized. Moreover, the reconstructed RGB images are merged into a color image, which illustrates the possibility of a color holographic three-dimensional (3D) display by holographic multiplexing of the LC cell. 展开更多
关键词 RGB Color holographic display based on azo-dye-doped liquid crystal LC cell REAL
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Time-division multiplexing holographic display using angular-spectrum layer-oriented method(Invited Paper)
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作者 赵燕 曹良才 +5 位作者 张浩 谭巍 吴圣函 王崝 杨强 金国藩 《Chinese Optics Letters》 SCIE EI CAS CSCD 2016年第1期16-20,共5页
A time-division multiplexing method for computer-generated holograms (CGHs) is proposed to solve the problem of the limited space-bandwidth product. A three-dimensional (3-D) scene is divided into multiple layers ... A time-division multiplexing method for computer-generated holograms (CGHs) is proposed to solve the problem of the limited space-bandwidth product. A three-dimensional (3-D) scene is divided into multiple layers at different depths. The CGH corresponding to each layer is calculated by an angular-spectrum algorithm that is effective at a wide range of propagation distances. All of the CGHs are combined into several group-CGHs. These group-CGHs are sequentially uploaded onto one spatial light modulator at a high frame rate. The spacebandwidth product can be benefited by the time-division processing of the CGHs. The proposed method provides a new approach to achieve high quality 3-D display with a fast and accurate CGH computation. 展开更多
关键词 BANDWIDTH HOLOGRAMS holographic displays Light modulators MULTIPLEXING Spectrum analysis Time division multiplexing
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Holographic display based on compressive sensing(Invited Paper)
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作者 沙漠洲 刘娟 +1 位作者 李昕 王涌天 《Chinese Optics Letters》 SCIE EI CAS CSCD 2014年第6期103-106,共4页
We propose a method to improve the quality of the reconstructed images based on compressive sensing principles. The pseudo-inverse matrix and the total variation minimization algorithms are combined to reduce the samp... We propose a method to improve the quality of the reconstructed images based on compressive sensing principles. The pseudo-inverse matrix and the total variation minimization algorithms are combined to reduce the sampling number of the computer generated hologram. Numerical simulations are performed and the results indicate that the peak signal to noise ratio is increased and the sampling ratio is decreased at the same time for holographic display. 展开更多
关键词 holographic display based on compressive sensing PSNR
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Active metasurface via magnetic control for tri-channel polarization multiplexing holography
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作者 毕钰 黄玲玲 +4 位作者 李拓 王长红 邹晓峰 周朗 康果果 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第4期112-118,共7页
Active metasurfaces have recently attracted more attention since they can make the light manipulation be versatile and real-time. Metasurfaces-based holography possesses the advantages of high spatial resolution and e... Active metasurfaces have recently attracted more attention since they can make the light manipulation be versatile and real-time. Metasurfaces-based holography possesses the advantages of high spatial resolution and enormous information capacity for applications in optical displays and encryption. In this work, a tunable polarization multiplexing holographic metasurface controlled by an external magnetic field is proposed. The elaborately designed nanoantennas are arranged on the magneto-optical intermediate layer, which is placed on the metallic reflecting layer. Since the non-diagonal elements of the dielectric tensor of the magneto-optical material become non-zero values once the external magnetic field is applied,the differential absorption for the left and right circularly polarized light can be generated. Meanwhile, the amplitude and phase can be flexibly modulated by changing the sizes of the nanoantennas. Based on this, the dynamic multichannel holographic display of metasurface in the linear and circular polarization channels is realized via magnetic control, and it can provide enhanced security for optical information storage. This work paves the way for the realization of magnetically controllable phase modulation, which is promising in dynamic wavefront control and optical information encryption. 展开更多
关键词 active metasurface magneto-optical effect polarization multiplexing holography dynamic holographic display
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The state-of-the-art in computer generated holography for 3D display 被引量:6
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作者 David Blinder Tobias Birnbaum +1 位作者 Tomoyoshi Ito Tomoyoshi Shimobaba 《Light(Advanced Manufacturing)》 2022年第3期168-196,共29页
Holographic displays have the promise to be the ultimate 3D display technology,able to account for all visual cues.Recent advances in photonics and electronics gave rise to high-resolution holographic display prototyp... Holographic displays have the promise to be the ultimate 3D display technology,able to account for all visual cues.Recent advances in photonics and electronics gave rise to high-resolution holographic display prototypes,indicating that they may become widely available in the near future.One major challenge in driving those display systems is computational:computer generated holography(CGH)consists of numerically simulating diffraction,which is very computationally intensive.Our goal in this paper is to give a broad overview of the state-of-the-art in CGH.We make a classification of modern CGH algorithms,we describe different algorithmic CGH acceleration techniques,discuss the latest dedicated hardware solutions and indicate how to evaluate the perceptual quality of CGH.We summarize our findings,discuss remaining challenges and make projections on the future of CGH. 展开更多
关键词 Digital holography holographic display Computer generated holography High-performance computing FPGA Deep learning Visual quality assessment
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Machine-learning-based high-speed lensless large-field holographic projection using double-sampling Fresnel diffraction method 被引量:1
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作者 Chentianfei Shen Tong Shen +2 位作者 Qi Chen Qinghan Zhang Jihong Zheng 《Chinese Optics Letters》 SCIE EI CAS CSCD 2022年第5期1-6,共6页
Machine learning can effectively accelerate the runtime of a computer-generated hologram.However,the angular spectrum method and single fast Fresnel transform-based machine learning acceleration algorithms are still l... Machine learning can effectively accelerate the runtime of a computer-generated hologram.However,the angular spectrum method and single fast Fresnel transform-based machine learning acceleration algorithms are still limited in the field-of-view angle of projection.In this paper,we propose an efficient method for the fast generation of large field-of-view holograms combining stochastic gradient descent(SGD),neural networks,and double-sampling Fresnel diffraction(DSFD).Compared with the traditional Gerchberg-Saxton(GS)algorithm,the DSFD-SGD algorithm has better reconstruction quality.Our neural network can be automatically trained in an unsupervised manner with a training set of target images without labels,and its combination with the DSFD can improve the optimization speed significantly.The proposed DSFD-Net method can generate 2000-resolution holograms in 0.05 s.The feasibility of the proposed method is demonstrated with simulations and experiments. 展开更多
关键词 computer-generated hologram holographic display machine learning
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